The ASCO Series 068 flapper isolation valve is designed for use with neutral or aggressive liquids and gases in analytical and medical systems. Its excellent self-draining capability and easy-to-flush low-volume internal cavity make the valve ideal in applications where cross-contamination must be minimized. The valve's special flapper mechanism results in no pumping or sticking effect of the valve seat. Typical applications include hematology, chromatography, liquid sample preparation, in-vitro diagnostics, DNA sequencing, and surgical fluid management.